Elevator



(No Model.)

M. O. SIGMUND. ELEVATOR.

No. 579,410. Patented Mar. 23, 1897.

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nrrnn TATES MATHIAS O. SIGMUND, OF READING,

anion,

PENNSYLVANIA, ASSIGNOR OF ONE- ELEVATOR.

SPECIFICATION forming part of Letters Patent No. 579,410, dated March23, 1897'. Application filed March 24, 1896. Serial No. 584,588. (Nomodel.)

To all whom, it may concern:

Be it known that I, MATHIAS O. SIGMUND, a citizen of the United States,residing at Readin g, in the county of Berks, State of Pennsyl- Vania,have invented certain Improvements in Elevators, of which the followingis a speci fication.

' scent of the cage or platform by cutting off or detaching the powerthat lowers the same; third, to set the brake so that the cage orplatform may descend by gravity, and, fourth, to regulate the positionof the pulley carrying the rope to the counterweight, that the same maybe adjusted relative to the position of the weight-pocket.

The invention consists in mechanism adapted to arrest the descent of thecage or plat form independently of any of the wheels or pulleys of theelevating mechanism.

The invention consists, also, in the construction and combination of thevarious parts, as hereinafter fully described, and then pointed out inthe claims.

In the accompanying drawings, forming a part of this specification,Figure 1 is a side elevation of the operating mechanism, showing thebrake applied to the hoisting-rope; Fig. 2, a top plan View, a portionof the campulley being cut away; Fig. 3, a side elevation of thecam-pulley and brake, the latter being shown disengaged from thehoistingrope by the cam; Fig. 4, a similar view, but showing the brakedisengaged from the hoisting-rope by the brake-lever; Fig. 5, a rearview of the brake-case, the back being broken away to show the interiormechanism; Fig.

6, a perspective view of the inner face of the keeper-plate; Fig. 7, atop View of the brake mechanism, and Fig. 8 a front elevation of thestandard supporting the deflection-pulley.

Similar letters indicate like parts throughout the several views.

Referring to the details of the drawings, A

indicates a support for the operating mechanism; A, a base uniting theparts of said operating mechanism; A the cage-well A the weight-pocket,and A a wall separating said well and pocket.

B indicates a shaft journaled in bearings 19, supported by posts P onopposite sides of base A. On an end of the shaft extended beyond one ofthe bearings Z) is keyed a driving-pulley B, around which passes theendless hand-rope B and on said shaft between the posts is keyed apulley D, preferably of less diameter than the driving-pulley and havinga cam, to be described, on one face thereof. Cain-pulley D is locatedover an opening a, leading through the support A and the base into thecage-well, and beneath one side of said cam-pulley isa smallerwellpulley E, journaled in posts e and the inner side of the peripheryof which is in line with the center of opening a. A deflection-pulley F,journaled in posts 1 of a standard F, is located on the opposite side ofthe cam-pulley and has the inner side of its periphery in line with avertical tangent to said cam-pulley. Allthese pulleys are grooved, thedrivingpulley to receive the hand-rope B and the pulleys D, E, and F toreceive the hoistingrope B which passes up through opening a to and overwell-pulley E, thence to and around cam-pulley D, then to and beneathdeflection-pulley F, and thence to and over pocket-pulley G, whence itextends down through opening a into weight-pocket A a weight W in saidpocket being attachedto the hoisting-rope.

The weight-pocket may be located behind, by the side of, or in any otherposition relative to the cage-well; and the pocket-pulley Gis always setin such position as to have the outer edge of its periphery over theopening a into said pocket. It is therefore necessary thatdeflection-pulley F be adjustable to conform with the position of saidpocketpulley. lVith this end in view standard F is constructed of theposts f, in which the deflection-pulley is journaled, a plate f,connecting the lower ends of said posts, and a threaded stem f dependingfrom the bottom of plate f. This stem passes through a slot f formed insupport A and base A concentrio with a vertical tangent to the adjacentedge of the periphery of cam-pulley D, wherein it is adjustably securedby a nut f Connected with the bottom of base A, beneath the center ofcam-pulley D, is a brake mechanism through which the hoisting-ropepasses. This brake mechanism comprises a case H, havingoppositely-located vertical grooves h in the inner faces of the endwalls thereof, said end walls h, adjacent to and on the inner side ofgrooves h, converging from the top toward the bottom of the case,friction-rollers 7L2 between walls h, a keeperplate 11, engaging groovesh and having on the inner face thereof short horizontal ribs 7L3, thatmaintain friction rollers 7L2 in their proper relative positions, and anupright arm H secured to keeper-plate H and through which the action ofsaid keeper-plate and friction-rollers is regulated, as will bedescribed. Rollers 7L2 are retained opposite each other and movedvertically in the channel between said walls by ribs 7L3, as shown inFig. 5, and hoisting-rope 13 passes down through case H, between rollers712, and is secured to the cage (not shown) below said case. Inoperating hoisting-rope B passes freely down through the case so long asthe keeper-plate is raised high enough to prevent friction-rollers 77,from binding on said rope; but when the keeperplate is allowed to dropthe friction-rollers close upon the hoisting-rope and hold the sameimmovable, and by reason of the construction the greater the downwardstrain on the hoisting-rope the more securely is it held.

Upright arm 11 has its upper end enlarged and a vertical slot 7L4 formedtherein that embraces shaft B, adjacent to cam-pulley D, the cam on theside of which is engaged by a stud 7L5, projecting from said arm belowslot 7%. This cam is formed by a polygonal rib, the sides K of whichcurve inward, whereby the angles K of the same are formed into pocketsor recesses, as illustrated in Figs. 1, 3, and 4.

As cam-pulleyl) is revolved the parts of the cam-rib pass, successively,beneath stud h", and when said stud is in engagement with either of thesides K of the cam-rib and there is no tension on the hand-rope the loadin the cage tends to revolve cam-pulley D until said stud slides intoone of the pockets K, thus lowering keeper-plate II untilfriction-rollers 71 grasp the hoisting-rope B and arrest the descent ofthe cage; but when hand-rope B is used to lower the cage the cam-pulleyD revolves with such rapidity that stud 7L5 leaves the curved approachto each pocket K and is caught by the reverse slope succeeding suchapproach before it (stud 7L5) has descended deep enough into the pocketto drop keeperplate H so low as to permit friction-rollers 7L to bind onthe hoisting-rope. In this movement each of said reverse slopes ofpockets K succeeds said curved approach of its pocket so rapidly thatthe drop of stud h is but slight, resembling somewhat the drop of a pawlbetween the teeth of a ratchet-wheel. \Vhen stud k is allowed to settleinto one of the pockets K, so that the friction-rollers may bind uponthe hoisting-rope and prevent downward movement of the same, saidhoisting-rope is again released from the frictionrollers by pulling onthe hand-rope, whereby the cam-pulley is revolved and stud 71, travelsup the reverse slope of the pocket in which it rests and releases thegrasp of the frictionrollers on the hoisting-rope. In practice thefriction-rollers arrest the downward movement of the hoisting ropebefore stud 71 reaches the bottoms of the pockets, for it must beunderstood that said pockets have sufficient depth to permit thefriction-rollers to firmly grasp the hoisting-rope before said stud hasreached the limit of its downward movement.

Extending inward from the post P, adjoining arm H of the keepenplate, isa horizontal member P, from which a post P projects diagonally upward;and to post P is fulcrumed a lever L, having one end, Z, pivoted to saidarm H below stud 71 while to the other end, Z, is attached a rope L,that passes down into the cage-well. WVhen it is desired to run the cagedown freely, arm II of the keeperplate is raised through rope L andlever L.

I do not restrict myself to the details of con struction herein shownand described, as it is obvious that many changes may be made thereinwithout departing from the principle and scope of my invention.

Having thus described my invention, what I claim as new, and desire tosecure byLetters Patent, is

1. The combination, in an elevator, of a brake comprising convergingwalls, frictionrollers movable between said walls, a device adapted tocontrol the positions of the friction-rollers with reference to theconverging walls, and means for actuating said device, and a ropepassing between the friction-rollers and having its movement controlledby said brake, for the purpose specified.

2. The combination, in an elevator, of a case having oppositely-locatedgrooves therein, converging walls in the case, friction-rollers betweenthe walls, an adjustable keeperplate engaging said grooves, ribs on thekeeper-plate and embracing the friction-rollers, and a rope controlledby said frictionrollers and passing between the same, substantially asand for the purpose specified.

3. The combination, in an elevator, of a case, converging walls in thecase, frictionrollers between the walls, a keeper-plate adj ustablelongitudinally of the channel between the walls and adapted to controlthepositions of said rollers with reference to the converging walls, anarm on the keeper-plate, a pulley, a connection between said arm and thepulley, whereby the keeper-plate is actuated, and a rope controlled bysaid frictionrollers and passing between the same.

4:. The combination, in an elevator, of a IIO case havingoppositely-located grooves therein, converging walls in the ease,friction-rolL' ers between the Walls, an adjustable keeperplate engagingsaid grooves, ribs on the keeper-plate and embracingthefriction-rollers, a shaft, a pulley on the shaft having a cam thereon,an arm on the keeper-plate, a connection between the arm and the cam,whereby the keeper-plate is actuated, and a rope controlled by saidfriction-rollers and passing between the same.

5. The combination, in an elevator, of a case having oppositely-locatedgrooves therein, converging walls back of the grooves, friction-rollersbetween the walls, an adjustable keeper-plate engaging said grooves,ribs on the keeper-plate and embracing said frictionrollers, an arm onthe keeper-plate and having a slot in the upper end thereof, a shaftpassing'through said slot, a pulley on the shaft, a cam on the pulleyand surrounding the shaft, a stud on said arm and adapted to engage saidcam, and a rope controlled by said friction-rollers and passing betweenthe same, substantially as and for the purpose specified.

6. The combination, in an elevator, with a brake comprising convergingwalls, and friction-rollers movable between said walls, substantially asdescribed, of a keeper-plate for supporting said rollers, an arm securedto the keeper-plate and having a slot in the upper end thereof, a shaftpassing through the slot, a pulley on the shaft, a cam on the pulley, astud on said arm and engaging said cam, and means for disengaging thestud from the cam, for the purpose specified.

7. The combination, in an elevator, with a brake comprising convergingwalls, and frictionrollers movable between said Walls, substantially asdescribed, of a keeper-plate for supporting said rollers, an arm securedto the keeper-plate and having a slot in the upper end thereof, a shaftpassing through theslot, a pulley on the shaft, a cam onthe pulley, astud on said arm and engaging said cam, a post, and a lever fulcruniedon said post and pivotally connected with said arm, whereby said arm israised to disengage the stud from the cam, substantially as and for thepurpose specified.

MATHIAS C. SIGMUND.

Witnesses:

JOHN H. Bownas, WM. F. SOHLEMM.

